中文摘要：

2003----2004年选用江苏省宜兴市稻一麦轮作试验田，研究了水稻生长季秸杆（0和3．75×10^3kg／hm^2两个水平）和N肥施用（N0、200和270kg／hm^2 3个水平）对后续麦季N2O排放的影响。结果表明：稻季秸杆施用显著减少了后续麦季N2O的排放，这些减少量主要体现在小麦播种一返青期，方差分析达显著水平（P〈0．05）。稻季施用N肥，后续麦季N2O排放减少，但N200和270kg／hm^2 N肥施用水平的处理间无显著差异。麦季土壤水分情况与N2O排放通量存在显著正相关（P〈0．05）。

英文摘要：

A field experiment was conducted in rice-wheat rotation system to study effect of application of wheat straw and nitrogen fertilizer in rice-growing season on N2O emission from following wheat-growing season at Yixing of Jiangsu province in 2003--2004. Two levels of wheat straw application （0 and 3.75 × 10^3 kg/hm^2） and three levels of nitrogen fertilizer application （N 0, 200 and 270 kg/hm^2） were adopted in experiment. Results from variance analyses indicated that application of wheat straw in rice-growing season significantly reduced N2O emission from following wheat-growing season, which happened mainly between wheat-sowing and returning-green periods （P〈0.05）. Application of nitrogen fertilizer in rice-growing season significantly decreased N2O emission from following wheat-growing season, while no significant differences in N2O emissions were observed between N 200 kg/hm^2 treatment and N 270 kg/hm^2 treatment. Significant positive correlation between N2O flux and soil water content was found during wheat-growing period （P〈0.05）.